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Shortest distance between a point and a line segment
...e line.
// It falls where t = [(p-v) . (w-v)] / |w-v|^2
// We clamp t from [0,1] to handle points outside the segment vw.
const float t = max(0, min(1, dot(p - v, w - v) / l2));
const vec2 projection = v + t * (w - v); // Projection falls on the segment
return distance(p, projection);
}
...
Seeding the random number generator in Javascript
...d.
Thankfully, hash functions are very good at generating seeds for PRNGs from short strings. A good hash function will generate very different results even when two strings are similar. Here's an example based on MurmurHash3's mixing function:
function xmur3(str) {
for(var i = 0, h = 17790337...
How do I raise the same Exception with a custom message in Python?
...essage " +e.message)
This will also do the right thing if err is derived from ValueError. For example UnicodeDecodeError.
Note that you can add whatever you like to err. For example err.problematic_array=[1,2,3].
Edit: @Ducan points in a comment the above does not work with python 3 since .me...
Cleaning `Inf` values from an R dataframe
... The "trick" was in realizing the is.na<- would not accept a result from lapply but would accept one from sapply.
– IRTFM
Aug 30 '12 at 1:30
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How to refresh app upon shaking the device?
...ensorManager mSensorManager;
private float mAccel; // acceleration apart from gravity
private float mAccelCurrent; // current acceleration including gravity
private float mAccelLast; // last acceleration including gravity
private final SensorEventListener mSensorListener = new SensorEventLi...
Accessing localhost (xampp) from another computer over LAN network - how to?
...my desktop computer (192.168.1.56) and want to access localhost over there from another computer (192.168.1.2).
24 Answers
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Site stopped working in asp.net System.Web.WebPages.Razor.Configuration.HostSection cannot be cast t
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My case was upgrading from mvc4 to mvc5.
I made sure my references were in sync (with a newly created mvc5 app), updated the web.config file accordingly and it still didn't work.
It finally worked when i changed my web.config file (INSIDE THE VIE...
How do I sort a dictionary by value?
I have a dictionary of values read from two fields in a database: a string field and a numeric field. The string field is unique, so that is the key of the dictionary.
...
In Python, how do I read the exif data for an image?
...
I use this:
import os,sys
from PIL import Image
from PIL.ExifTags import TAGS
for (k,v) in Image.open(sys.argv[1])._getexif().items():
print('%s = %s' % (TAGS.get(k), v))
or to get a specific field:
def get_field (exif,field) :
for (k,v) i...
How can I respond to the width of an auto-sized DOM element in React?
...complex web page using React components, and am trying to convert the page from a static layout to a more responsive, resizable layout. However, I keep running into limitations with React, and am wondering if there's a standard pattern for handling these issues. In my specific case, I have a compone...